Forming-machine.



P. Z. KOHLHAAS.

FORMING MACHINE.

APPLIGATION YILED nm. 18.

Patented Oct. 27, 1914.

2 SHEETS-BHET 1.

P. Z. KOHLHAAS.

FORMING MACHINE.

APPLIOATION PILED 1130.18. 1911.

Pana 0011221914.

W1Jwesses 44 UNITED srATEs rArENrr orrrcn. PETER z. OHHAS, 01? yCHJICM'K), rmgrnors,

` rozmme-mbnm'n.

specification of Lettei'al'latent.

Patented Oct. 27, 1914.

Application; flled December 18, 1911. Serial Ho. 668,509.

To all whom it may concern:

Be it known that`I, PETERVZ. KoHLHAAs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Ii`orming-Machines,|

efticient, economical and practical machine;- the accom-.

My invention is illustrated in panying drawings, in which- Figure 1 is a general front elevational view of my machine; Fig. 2 is a plan view of 'the pillow block and the associated die E parts; Fig. 3 is an elevational sectional view taken approximately on the plane of the line i 3-3 of Fig. 2, and looking in the direction indicated by the arrows; Fig. 4 is a crosssectional view taken approximately on the1 plane of the line /1-4z of Fi 3 and looking in the direction indicated y the arrows; Fig. 5 shows the manner in which a gu1de= member is attached to one of the die memzbers; Fig. 6 shows the die members in two of their positions; Fig. 7 shows them in,

still another position; Fig. 8 shows the blank;

for the knife which has been referred to;;

.and Fig. 9 shows the same blank after it has 35 are thus mounted to oscillate and are been worked in my machine.

Like reference characters are applied to' the same parts throughout the various figures.

Referring first to Fig. 1, it will be seen that the machine comprises a framework having the bolster block 10, the legs 11, 11, and the uprights 12, 12, which are mounted upon the bolster block 10. At the tops of' the uprights 12, 12 journal boxes 13, 13 are` provided and a crank shaft 14 is mounted' in these journal boxes. The crank shaft 14;; extends beyond the journal boxes on one side y and is there provided with a pulley 15 which may be connected With a suitable source of power by means of a belt 16. The crank 17 of the shaft 14 is connected, by means of a' pitman 18, with a head 19 which is mounted; to reciprocate in suitable ways 20, 20 secured.| on the inside of the uprights 12, 12.

Secured upon the bolster block 10, by means of bolts 21, 21, is a pillow block 221 lwhich is more or less rectangular in shape in that t that it has a' central opening 28. At one end of the opening 23 the pillow block 22 is provided with a pocket' 24 and a die carrier, in the form of a block 25 is rigidly secured in this pocket, alcover iate 26, held in place by means of bolts 27, 27, assisting in this respect.v At the opposite end of the central opening 23, an op osing channel 26'* is provided, this channe extcnding nearly to the end of the pillow block, as clearly illustrated m Fi 3. The sides of this channel 26EL are provi ed with the ways 27", 27, and a die carrier 28, having tenons 29, 29 fitting in these ways, is thus mounted in the channel. It will be evident that this manner of mounting the die carrier 28 admits of its adjustment toward or away from the other die carrier. It is held in any adjusted position by means of clamping screws 30, 30 which pass through a plate 31, secured to the pillow block 22 by means of screws 32, 32, and which engage the pillow block as shown.

f' The ldie carrier 25 carries the die member 33 which is pivoted thereto on the axis 34, this die member extending toward the die carrier 28. The die carrier 28 carries the die member 35 which is hinged thereto on the axis 36, this die member extending toward the other die member as clearly shown in Fig. 3. These die members are substantially of the same length and their ends, thus arranged to be adjacent, form coperating die faces. These die members 33 and normally held in their upper position by 'means of Springs 37, 37 disposed between their under sides and parts of the pillow block 22. The upward movement of these die members is limited by their engagement with the ends of the screws 38, 38, threading in the plates 26 and 31, and it will appear that these screws can be adjusted in order to secure the proper alinement of the die faces w and y. The Springs 37, 37 are held in place by their engagement about studs 89,39.

The pillow block 22 is so disposed upon the bolster 10 that the die faces m and 1/ will be substantially below the middle of the reciprocating head 19, the idea, being that the face of the head shall come down upon the topl of the die members. It will be seen ese die members, in principle, form the elements of a toggle joint, and that the head 19 is the means whereby the transverse pressure is secured. The relative positions of the head 19 and the die members are clearly illustrated in lFvig. 3. lAs auxiliary features, the face of the head 19 is provided with rollers 40, 40 which are the parts which really engage the die members, so as to avoid friction as far as ossible. Another auXiliary feature lies 1n the provision of the Springs 41, 41 between' parts of the head 19 and the tops of the die members.w 1t willbe understood that when the head comes down the Springs 41, 41 are compressed, but the power is delivered ldirectly to the die members through the rollers and not through the springs. The provison of these Springs secures positive action and prevents kicking and undesirable throwing back of' the parts upon the return'rnovement. lit will now be seen that when the shaftl 14 turns, the head 19 will reciprocate vand will intermittently come' down upon the top of the die members which normally are in the posltion shown in .full lines in Pig-.3. The movement of the head brings the die members down into the position shown in dotted lines in Fig. 3, againstthe tension of the Springs 37, 37. Anything inserted between the faces w and y, during this downward movement of the head will be subject to a tremendous pressure since the power developed by the head is magnified many times on the toggle joint principle.

The head 19 is provided with a bracklet 42 which extends downwardly therefrom and laterally under the die members. This bracket may engage a roller 43 suitably mounted in the pillow` block at the side at the central opening, as illustrated in Fig. 2, as further guiding means. This bracket has no function on the downward movement of the head, but upon the upward movement it brings back the die members and serves to carry them across the line of the die centers.

One of the die members is provided with a guide 44 which may be of any form in order that it may hold the particular article to be worked in proper position for action. The operator is required to place the blank on this guide member so that the part to be worked is disposed between the die faces when they are in theposition shown in full lines in Fig. 3. Applying the power, the head comes down and the die faccs are pressed together to secure the proper result. When the die members reach their lower position, that shown in dotted lines in Fig. 3, the worked article may drop therefrom and the bolster 10 is provided with an alining` opening 45 so that the article, thus far finished, may drop into a receptacle below.

In Fig. 8 I show a blank for the production of a knife. In Fig. 6, in dotted lines, 1 show the manncr in which this blank is initially disposed between the die faces. These 'faces are so formed that as they cooperate they press the blank between them and taper the edge thereof by applying the pressure gradually and increasingly from side to'side. The result is a sharpened edge as illustrated in Fig. 9.

lt will appear that if the block 28 were movable and the ends of the members 33 and 35 could rideI together, the face of this block 28 could be used as a die member as illustrated in Fig. 3. This block is provided with a die piece 46 which coperates with adie piece 47 on a block 48 mounted in the ways 27a inthe manner previously described with reference to the block 28. However, this block 48 abuts against a wedge block 49 which is associated with a stationary abutment 50 at the end of the `pillow block. This wedge block 49 carries the screws 51, 51 which have their heads rotatably mounted therein and which are threaded 4in a plate 52 secured upon the top of the pillow block. Tt will appear that when the screws 51, 51 are turned it will either raise or lower the wedge block 49 and, by the coperation of the oblique faces, the block 48 may be brought into any desired position. Once adjusted, it is permanent 'land secure and looking may be had by means of bolts 53 which are threaded in a plate 54 secured to the block 48 by means of screws 55, 55, and which engage the pillow block, as illustrated in Figs. :2 and 3. If the die parts 46 and 47 are to be used, the screws 30, 30 are loos-A enedv and the proper toggle pieces are substituted for the parts 33 and 35. The idea is that of using the advantage of a toggle joint principle in a'slightly different way if the nature of the work in hand makes it desirable--all in one machine. Springs 54', 54' are provided between lugs 55', 55' extending from the toggle members and the pillow block, as illustrated in Fig. 2.

I claim as new and desire to secure by Letters Patent- 1. In a forming machine, a pair of die members pivotally mounted upon parallel axes and extending toward each other, the adjacent ends thereof forming die faces. a reciprocating head Operating in a plane normal to the aXes of the die members and substantially midway therebetween for applying force to said members, a compression spring interposed between said reciprocating head and `said die members, and a compression spring bearing against each-of said die members tending to move it toward said reciprocating head and against the action of said first mentioned spring, said reciprocating head when movedtoward said die members first compressing the spring interposed between said reciprocating head and the die members and then positively engaging said die members andoperating them against the action of their individual compression Springs, substantially as described.

2. In a forming machine, a pair of die members pivotally mounted upon Iparallel axes and extending toward each ot er, the adjacent ends thereof forming die faces, a reciprocating head operating in a plane normal to the axes of the die members and substantially midway therebetween for applying force to said members, a compression spring interposed between said reciprocating head and said die members, a com ression spring bearing against each of said die members tending to move it toward said reciprocating head and against the action of said first-mentioned s ring, said reciprocating head when move toward said die members first compressing the spring interposed between said reciprocating head and the die members and then positlvely engaging said die members and Operating them against the action of their individual compression Springs, and a bracket carried by said reciprocating head extending below said die members, and being there provided With a portion extending under the same, said bracket having positive' engagement with said die members when said reciprocating head is in its extreme retracted position.

3. In a forming machine, a pair of die members pivotally mounted upon arallel axes and extending toward each ot er', the adj acent ends orming die faces, a positioning device secured to one of said die members, a reciprocating head for applying force to said die members, normal to the plane of the axes and substantially midway therebetween, resilient elements on op osite sides of said die members, and a brac et carried by said head and extending underneath said die members, and having positive en agement with| said die members when sai head is in its uppermost position.

4. In a forming machine, a pillow block a pair of die members pivotally mounted in said pillow block upon parallel axes and extending toward each other, adjacent ends forming die faces, a reciprocating head associated with said die members, a spring interposed between said die members and said head and a ledge carried by one of said die members adapted to support a blank between the die faces when the die members are in normal position, said reciprocating head when moved toward said die members first compressing said spring and then positively engaging said die members and operating them, the blank initially supported by said ledge dropping from between the die faces when said die members have passed the line through their pivotal points, substantially as dcscribed.

5. In a machine for sharpening knives, a unitary pillow block, a pair of pivoted die members mounted on said block, and extending toward each other, said pillow block having an aperture to allow the pivoted die members to swing on both sides of their pivots, stops carried by said pillow block for limiting the upward movement of said die members, Springs interposed between said pillow block and said die members for normally retaining the' dies against the stops.

6. In a machine for sharpening knives, a unitary pillow block, a pair of pivoted die members extending toward each other, said die members mounted on said pillow block, an aperture through said pillow block to allow the die members `to swing on both sides of the line of the pivots of said pivoted die members, stops carried by said pillow block for limiting the upward movement of the die members, Springs interposed between the pillow block and the die members for holding the dies against'the stops, and a lunger for engaging both of said die memiiers to force the same past said center line.

In Witness whereof, I hereunto Subscribe my name this 13th day of December, A. D.,

- PETER Z. KOHLHAAS. Witnesses:

ARTHUR H. Bom'romm, WILLIAM E. S'mmmn. 

